NEC Corporation, referred to as NEC for short, is a multinational information technology company in Japan, headquartered in Ku, Minato, Japan. NFC is a near-field communication technology, which is similar to Bluetooth but superior to Bluetooth in the future life of Internet of Things, and can be used to connect Bluetooth devices, pay and other functions. ? You can directly Baidu [[NFC]].

NFC on your phone can:

1, mobile payment: for example, when shopping in shopping malls, supermarkets, restaurants and other places, swipe your mobile phone to pay the bill.

2. Access Pass: For example, access control in residential areas. If there is a corresponding verification code in our mobile phone, please brush it when you enter the door, OK.

3. Data transmission: stick two mobile phones supporting NFC back to back, and transmit photos, music and other data through Android Beam.

VoLTE is an IMS-based voice service. IMS supports multiple access and rich multimedia services, and has become the core network standard architecture in the all-IP era.

After several years of development and maturity, IMS has now crossed the rift valley and become the mainstream choice for the transformation of VoBB and PSTN networks in the fixed voice field, and has also been determined as the standard architecture of mobile voice by 3GPP and GSMA.

VoLTE is an LTE voice and an IP data transmission technology. All services are carried on the 4G network, which can realize the unification of data and voice services under the same network without 2G/3G network.

In other words, 4G networks not only provide high-speed data services, but also provide high-quality audio and video calls, all of which require VoLTE technology.